Fair enough, usability will obviously be poor if the scale is difficult to read. My eyesight is terrible but at least it is still all myopia so I can compensate

Fair enough, usability will obviously be poor if the scale is difficult to read. My eyesight is terrible but at least it is still all myopia so I can compensate by putting the calipers extremely close to my eyes. Looks awkward and people call me Mr. Magoo but it works!